package com.njth.servlet.action;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.njth.beans.User;
import com.njth.dao.DaoConfig;
import com.njth.dao.UserDAO;

public class Login extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public Login() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		this.doPost(request, response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		String userName=request.getParameter("userName");
		String password=request.getParameter("password");	
		request.setAttribute("userName", userName);
		UserDAO dao=(UserDAO) DaoConfig.getDao(UserDAO.class);
		User u=dao.getUserByName(userName);
		String error=null;
		if(u==null){
			error="不存在用户："+userName+"!";
		}else if(!u.getUserPass().equals(password.trim())){
			error="密码错误！";
		}
		if(error!=null){
			request.setAttribute("error", error);
			request.getRequestDispatcher("/com/njth/jsp/administrator.jsp").forward(request, response);
			return;
		}
		request.getSession().setAttribute("currentUser", u);
		if(u.getUserType()==0){
			response.sendRedirect(request.getContextPath()+"");
		}else if(u.getUserType()==1){
			response.sendRedirect(request.getContextPath()+"/com/njth/jsp/manager.jsp");
		}
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
